Expected outputs of subgraph is incorrect

[sreejithsankar55]

Expected outputs of graph/example/subgraph.expected and graph/example/subgraph.cpp is incorrect.

[Becheler]

Thank you for opening this issue and proposing a PR 😄

I will close this issue as stale and can not replicate, as well as its related PR #162

This is also superseded by the documentation migration to Antora #491 where examples output are regenerated in CI.

Thanks again 🙏🏽